:root {
    --container-width: 300px;
  }
#group {
    width: var(--container-width);
    & > * {
        margin-right: calc(( 100% - 95px * 3 )/2);
        margin-bottom: calc(( var(--container-width) - 95px * 3 )/2);
        width: 95px;
        text-align: center;
        border-radius: 5px;
        border-inline-start-width: 1px;
        
        &::before {
        width: 0px;
        }
    }
    & > :nth-child(3n) {
        margin-right: 0;
    }
}